Events

Description:

Continuous Nanomanufacturing Processes to Fabricate Nanoscale Structures for Display and Solar Cell Applications

Prof. L. Jay Guo
Depts. of Electrical Engineering & Computer Science, Applied Physics, and Macromolecular Science & Engineering
University of Michigan, Ann Arbor

PLEASE NOTE - NEW LOCATION.

Crowne Plaza Hotel (Bayview Room) - 1221 Chess Drive, Foster City, CA

NOT at Michael's Restaurant at Shoreline Park in Mountain View

Abstract

This talk will discuss the need and possible solutions for high-speed nanoscale patterning. I will provide several examples to show that nanostructures can provide new functionality or improved performance in photonic and optoelectronic devices. These include a high efficiency plasmonic color filter consisting of arrays of subwavelength nanoslits cut into a metal-dielectric-metal stack [1]; flexible nanowire grid based transparent electrode for organic solar cells and with plasmonic enhancement [2]; as well as means to produce improved nanoscale morphology in polymer solar cells for improved efficiency [3]. However to move these new findings to practical applications, high speed fabrication technology is critically needed, which can scale up the process to large area and continuous manufacturing. Toward this end, we have exploited a few techniques as initial steps to realize such possibilities. We developed continuous roll to roll nanoimprinting on plastic substrate and roll to plate nanoimprinting on rigid substrate by using a large area flexible mold, with printed linewidth down to 50nm [4]. To alleviate the need for a large area mold for nanopatterning, we also developed a Dynamic NanoInscribing (DNI) process that uses a thin slice of a cleaved Si mold and can produce nano- and microscale grating structures in polymer materials with high speed and at ambient environment [5], which thus can preserve the properties of functional materials. Lastly we show that even without a patterned master it is still possible to generate micron-scale periodic patterns in a metal coated plastic surface with very high speed by exploiting a localized and dynamic wrinkling phenomenon [6].
References:
[1] T. Xu, Y.-K. Wu, X.-G. Luo, and L. J. Guo, “Plasmonic nano-resonators for color filtering and spectral imaging,” Nat. Comm. 2010, doi: 10.1038/ncomms1058.
[2] M. G. Kang, T. Xu, H. J. Park, X. G. Luo, and L. J. Guo, “Efficiency Enhancement of Organic Solar Cells using Transparent Plasmonic Ag Nanowire Electrodes,” Adv. Mater. 22, 4378–4383, 2010.
[3] H. J. Park, M. G. Kang, S.-H. Ahn and L. J. Guo, “Facile route to polymer solar cells with optimum morphology applicable to roll-to-roll process,” Adv Mater, 22, E247-E253, 2010.
[4] S. H. Ahn, and L. J. Guo, “Large-area Roll-to-Roll and Roll-to-Plate Nanoimprint Lithography and analytical models for predicting residual layer thickness,” ACS Nano 3, 2304–2310, 2009.
[5] S.-H. Ahn and L. J. Guo, “Dynamic Nanoinscribing for Continuous and Seamless Metal and Polymer Nanogratings,” Nano Lett. 9, 4392-4397, 2009.
[6] S.-H Ahn and L. J. Guo, “Spontaneous Formation of Periodic Nanostructures by Localized Dynamic Wrinkling,” Nano Lett. 10, 4228–4234, 2010

Speaker Background

L. Jay Guo received a B.S. from Nankai University, China, and a MS and Ph.D. from the University of Minnesota. He was a research associate at Princeton University from 1998-1999. He joined the Department of Electrical Engineering and Computer Science at the University of Michigan, Ann Arbor in 1999, and is currently an associate professor of Electrical Engineering and Computer Science, Applied Physics, and Macromolecular Science and Engineering. His research areas include nanofabrication technologies, photonic microresonator sensors, organic electronic and photonics, nanoimprint lithography with applications in polymer photonic devices and biotechnologies. (See the web page link above for more details on his research.)

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Date:

Thursday January 27

Location:

Crowne Plaza Hotel - Bayview Room
1221 Chess Drive
Foster City, CA

The Bayview Room is on the 7th floor of the Executive Tower, which is in a separate building to the left (east) of the hotel's main entrance. Directions  Map

Parking:

Parking is available at no charge next to the Executive Tower as well as next to the main building

Timing:

6 PM social hour
7 PM dinner
8 PM lecture

Cost:

	Employed/postdoc	Student/unemployed/retired
Early Registration - Up to 7 days in advance of deadline	$30	$15
Registration - Up to deadline	$35	$20
After deadline/walk-in (Availability NOT guaranteed)	$40	$25

 
Lecture-only is free.

Payment:

We accept cash or checks, but are unable to accept payment by credit card at this time. Payment is taken at the door.  No-shows are responsible for full payment of registration fee.

Registration:

Please register on the web page https://ggpf.mystagingwebsite.com/ or contact:
Len Radzilowski
email: lradzilo@tycoelectronics.com
phone: 650-361-3264

Deadline for registration:

5PM, Wednesday January 19 for early registration discount
5PM, Wednesday January 26 for registration (or until venue has reached capacity.)

Dinner Selections:

Grilled Salmon with Ginger Soy Sauce
Chicken Picatta with Lemon, Capers and White Wine
Mediterranean Farfalle Pasta

You should receive confirmation of your registration; if not, please contact us again.